Various designs of the DIRC based on barrel radius
ATHENA
- barrel radius: 970 mm
- number of bar boxes: 16
- bar box width: 360
- number of bars in bar box: 11
- PMT layout: 6x4
![](/~rdzhigad/data/eic/eicdirc_designs/vis_0.png)
![](/~rdzhigad/data/eic/eicdirc_designs/vis1_0.png)
ECCE
- barrel radius: 740 mm
- number of bar boxes: 12
- bar box width: 360
- number of bars in bar box: 11
- PMT layout: 6x4
![](/~rdzhigad/data/eic/eicdirc_designs/vis_1.png)
![](/~rdzhigad/data/eic/eicdirc_designs/vis1_1.png)
CORE
- barrel radius: 500 mm
- number of bar boxes: 12
- bar box width: 240
- number of bars in bar box: 7
- PMT layout: 4x4
![](/~rdzhigad/data/eic/eicdirc_designs/vis_2.png)
![](/~rdzhigad/data/eic/eicdirc_designs/vis1_2.png)
Comparison:
![](/~rdzhigad/data/eic/eicdirc_designs/eicdircs_xy.png)
![](/~rdzhigad/data/eic/eicdirc_designs/eicdircs_angle.png)
![](/~rdzhigad/data/eic/eicdirc_designs/eicdircs_angle1.png)